Thermostat housing



FIG. 1 is a perspective view of a thermostat housing;

FIG. 2 is a front elevation view of the thermostat housing of FIG. 1; and,

FIGS. 3-6 are left, bottom, right and top views of the thermostat housing of FIG. 1.

The portions illustrated in broken lines on the figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a thermostat housing, as shown and described. 